I'm sorry to say you may need to recode all your CFChart tags from scratch. A new charting engine was installed for CF11 and there was very little done in the way of backward compatibility. Adobe screwed everyone with this change. Please see this posting:
I was hoping that I can change something and get this charts to look similar at least. What documentation I should use to build the new charts in CF11?
Look through the CF11 documentation for CFChart and you'll see several new attributes that accept JSON sting for styling. Exactly what those string need to be is found here: Docs | JSON Attributes | Legend Objects | Item | ZingChart
Look through that previous posting I sent you. Several examples are provided in there. Adobe's documentation is poor so it's very much trial and error to get your look back.